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QGIS Planet

From CAD to GIS: When you need to make the transition

Discover why and how to transition your engineering drawings from CAD to GIS for improved asset management, spatial querying, and real-world accuracy.
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NDVI vs EVI, SAVI, NDRE and NDWI: Which Index When

NDVI flattens out over dense canopy. EVI, SAVI, NDRE, NDWI and NDMI each fix one of its blind spots. Formulas, Sentinel-2 bands and a measured test in Brazil.
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Satellite Imagery Resolution Compared: What You See at 30 m, 10 m, 3 m and 30 cm

Pixel sizes from Landsat to drones, one French suburb shown at each, and a count of how many of its 20,911 buildings and 2,966 pools each resolution can see.
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Sentinel-2 vs Landsat 8 and 9: Bands, Resolution, Revisit

Sentinel-2 sees 10 m pixels every few days, Landsat 8 and 9 see 30 m with a thermal band and an archive back to 1972. Bands side by side, and a year of clear views counted at three farms.
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Thoughts and Discussions on the Development of QGIS Plugins

A few weeks ago, Oslandia organized a webinar/roundtable discussion titled “Creating QGIS Plugins in 2026: Challenges, Expectations, and Concerns!” open to the international developer community.

The goal was to share our experiences as QGIS plugin developers—including our objectives, habits, and challenges—as well as to discuss the available tools.

This discussion was also a great opportunity to share our feedback as developers, identify needs related to QGIS plugin development, and explore ways to make the most of our development work.

If you missed the session, you can find the recording here: https://s.zoom.us/m/bPlTUNXA2

Julien Moura’s introductory presentation is also available!

As a key contributor to the open-source QGIS solution, Oslandia has been actively contributing to its development for over 15 years—from the QGIS core to the development of plugins such as CityForge and, more recently, QSunPotential.

If you’d like to discuss your challenges, difficulties, or ideas, feel free to contact us at: infos+qgis@oslandia.com

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Embed Interactive Maps on Websites with Kumoy - QGIS LAB by MIERUNE

Introduction When you show a QGIS map on a web page as an image, viewers cannot pan to the place they care about or zoom in for detail. Building a web map from scratch is another option, but it requir...
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ChatGPT for QGIS: What It Can and Can't Do, Tested

Can ChatGPT automate QGIS? I asked it for PyQGIS code on three real tasks and ran every script in QGIS. What worked, what failed without an error, and why.
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What Is a CRS (Coordinate Reference System)?

A CRS tells software where coordinates sit on Earth. Datums, projections, EPSG codes, 4326 vs 3857, and how to fix a layer that lands in the wrong place.
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What Is NDVI? Meaning, Values and Formula

NDVI measures how green and dense vegetation is, from red and near-infrared light. What the values mean, a season measured field by field, and QGIS steps.
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What Is PyQGIS? Automate QGIS With or Without Code

PyQGIS lets you control QGIS with Python. Where to run it, a first script, and a test of how often chatbot-written PyQGIS works, with a no-code option.
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